vendor/sysinfo-0.26.7/examples/simple.c

   1 // Take a look at the license at the top of the repository in the LICENSE file.
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <sys/types.h>
   6 #include <unistd.h>
   7 #include <pthread.h>
   8 #include "sysinfo.h"
   9
  10 void print_process(CProcess process) {
  11     RString exe = sysinfo_process_get_executable_path(process);
  12     printf("process[%d]: parent: %d,\n"
  13            "             cpu_usage: %f,\n"
  14            "             memory: %ld,\n"
  15            "             virtual memory: %ld,\n"
  16            "             executable path: '%s'\n",
  17            sysinfo_process_get_pid(process),
  18            sysinfo_process_get_parent_pid(process),
  19            sysinfo_process_get_cpu_usage(process),
  20            sysinfo_process_get_memory(process),
  21            sysinfo_process_get_virtual_memory(process),
  22            exe);
  23     sysinfo_rstring_free(exe);
  24 }
  25
  26 void check_tasks(CSystem system) {
  27 #ifdef __linux__
  28     bool task_loop(pid_t pid, CProcess process, void *data) {
  29         (void)data;
  30         printf("  ");
  31         print_process(process);
  32         return true;
  33     }
  34
  35     void *sleeping_func(void *data) {
  36         sleep(3);
  37         return data;
  38     }
  39     pthread_t thread;
  40     pthread_create(&thread, NULL, sleeping_func, NULL);
  41     sysinfo_refresh_system(system);
  42     CProcess process = sysinfo_get_process_by_pid(system, getpid());
  43     printf("\n== Task(s) for current process: ==\n");
  44     print_process(process);
  45     printf("Got %ld task(s)\n", sysinfo_process_get_tasks(process, task_loop, NULL));
  46 #else
  47     (void)system;
  48 #endif
  49 }
  50
  51 bool process_loop(pid_t pid, CProcess process, void *data) {
  52     unsigned int *i = data;
  53
  54     print_process(process);
  55     *i += 1;
  56     return *i < 10;
  57 }
  58
  59 int main() {
  60     CSystem system = sysinfo_init();
  61     sysinfo_refresh_all(system);
  62     printf("total memory:         %ld\n", sysinfo_get_total_memory(system));
  63     printf("free memory:          %ld\n", sysinfo_get_free_memory(system));
  64     printf("used memory:          %ld\n", sysinfo_get_used_memory(system));
  65     printf("total swap:           %ld\n", sysinfo_get_total_swap(system));
  66     printf("free swap:            %ld\n", sysinfo_get_free_swap(system));
  67     printf("used swap:            %ld\n", sysinfo_get_used_swap(system));
  68     printf("networks received:    %ld\n", sysinfo_get_networks_received(system));
  69     printf("networks transmitted: %ld\n", sysinfo_get_networks_transmitted(system));
  70     unsigned int len = 0, i = 0;
  71     float *procs = NULL;
  72     sysinfo_get_cpus_usage(system, &len, &procs);
  73     while (i < len) {
  74         printf("CPU #%d usage: %f%%\n", i, procs[i]);
  75         i += 1;
  76     }
  77     free(procs);
  78
  79     // processes part
  80     i = 0;
  81     printf("For a total of %ld processes.\n", sysinfo_get_processes(system, process_loop, &i));
  82     check_tasks(system);
  83     // we can now free the CSystem object.
  84     sysinfo_destroy(system);
  85     return 0;
  86 }